JPH0630151U - Copper refining furnace - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the molten metal that splashes from the surface of the molten metal or flows into the interior from the gutter adheres to the circumferential end of the inlet, damage to the furnace body can be suppressed. While you can
An object of the present invention is to provide a refining furnace capable of easily removing the attached splash. [Structure] An inflow port 30 through which crude copper flows into a cylindrical furnace body 21 is provided so as to extend in the circumferential direction and open.
In a copper refining furnace in which 1 is tilted around an axis and refines crude copper flowing into the furnace from the inflow port 30 to produce high-quality copper, at least an end portion of the inflow port 30 in the circumferential direction. It is characterized in that cooling jackets 41, 42 are attached to the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a copper refining furnace (hereinafter simply referred to as a refining furnace) that refines crude copper that has flowed into the furnace to produce high-quality copper.

[0002]

[Prior art]

 The refining furnace is installed in a copper continuous smelting apparatus that continuously smelts copper. As shown in Fig. 4, this continuous copper smelting device dissolves and oxidizes the copper concentrate supplied together with the oxygen-enriched air, and has a river containing a mixture of copper sulfide and iron sulfide as a main component and a copper concentrate. A smelting furnace 1 that produces karami made of gangue, solvent, iron oxide, etc. inside, a separation furnace 2 that separates the kawa and the kawami produced in this smelting furnace 1, and the kawa is further oxidized. It is composed of a copper-making furnace 3 for producing crude copper, and a refining furnace 4 for purifying the crude copper produced in the copper-making furnace 3 to produce copper of high copper quality.

In the figure, 5 is a lance having a double-tube structure, 6 is an electrode for heating the river and the kelami, 1A, 2A and 3A are molten metal outlets, and 7A and 7B are molten metal. 2B and 3B are Karami outlets.

Further, the copper-making furnace 3 and the refining furnace 4 are connected by a gutter 11B which is a molten metal flow path.

As shown in FIG. 5, the refining furnace 4 has a closed cylindrical furnace body 21 composed of end plates 21a and a body portion 21b at both ends, and is provided in the body portion 21b. By a support ring (not shown) in contact with the guide ring 22, the shaft is supported so as to be tiltable around the axis with the axis being horizontal. Then, by engaging a drive gear (not shown) with a tilting gear 24 installed at one end of the furnace body 21, the furnace body 21 is tilted. Further, a flue opening (inlet) 30 is formed on the other end side of the furnace main body 21 so as to extend in the circumferential direction and opens. The flue opening 30 is covered with a cover (not shown), and the flue opening is further provided. An end portion 11C of the branch gutter 11B is faced and connected to 30. In the figure, 26 is a burner for adjusting the temperature of the molten metal in the furnace, 27 is a tuyere for supplying air or oxygen-enriched air or a reducing agent into the furnace, and 28 is a refined one. Is a tap hole for casting copper into the anode, and 29 is a charging port for inserting a lump such as anode scrap into the furnace.

[0006]

[Problems to be solved by the device]

 However, in the conventional refining furnace 4, the flue port 30 as an inflow port is arranged in the circumferential direction so that the furnace body 21 can be tilted around the axis while continuously injecting the molten metal from the branch gutter 11B. Since it is formed so as to extend to the end, the end of the flue port 30 in the circumferential direction is close to the surface of the molten metal in the furnace, and the splash generated from the surface of the molten metal during oxidation, reduction, etc. May adhere. The molten metal flowing in from the gutter 11B may be scattered and adhere to the ends. Due to this adhesion, damage to the furnace body 21 forming the flue port 30 (usually, a refractory brick is lined with a steel plate) is removed, or the splash or molten metal adhered and solidified is removed. There is a problem that it takes a lot of time and damages the furnace body during removal.

The present invention has been made in view of the above circumstances, and can prevent damage to the furnace body even if splash or molten metal from the molten metal surface adheres to the circumferential end of the inlet. At the same time, it is an object of the present invention to provide a refining furnace capable of easily removing the attached splash or molten metal.

[0008]

[Means for Solving the Problems]

 In the refining furnace of the present invention, a cylindrical furnace body is provided with an inlet through which blister copper flows in an opening extending in the circumferential direction, and the furnace body is tilted around an axis, and the inside of the furnace is tilted from the inlet. In a copper refining furnace for refining the crude copper that has flowed into the furnace to produce high-quality copper, a cooling jacket is attached to at least the circumferential end of the inlet.

[0009]

[Action]

 Also in the refining furnace of the present invention, since the inlet is provided so as to extend in the circumferential direction of the furnace body and open, the circumferential end of this inlet is close to the molten metal level inside the furnace. Splash or molten metal generated from the surface of the molten metal is scattered and attached to this end. However, in the refining furnace of the present invention, since the cooling jacket is attached to at least the circumferential end of the inflow port, even if splash or molten metal is attached to this end, immediately Cooling prevents damage to the jacket and furnace body near the outlet. Furthermore, since the scattered splash or molten metal adheres to the surface of the jacket and is solidified, it can be removed more easily and cleanly than the splash or molten metal adhered around the refractory bricks. Therefore, the time and effort required to remove the attached splatter or molten metal can be greatly reduced, and the jacket is not damaged during the removal.

[0010]

【Example】

 A refining furnace according to an embodiment of the present invention will be described below with reference to the drawings. The same components as those in FIG. 5 will be described with the same reference numerals.

As shown in FIGS. 1 to 3, a body portion 21 b of the furnace body 21 is provided with a flue port 30 into which molten metal flows. The flue port 30 extends in the circumferential direction of the body portion 21b of the furnace main body 21 and opens, and the inner surface thereof is formed of refractory brick 30a.

Jackets 41 and 42 made of iron or copper alloy are attached to the outer sides of the circumferential end portions 30 b and 30 c of the flue gas outlet 30. The jackets 41, 42 are provided with arcuate surfaces 41c, 42c along the inner peripheral surface of the flue opening 30. Further, an inlet 41a into which cooling water flows in and an outlet 41b from which the cooling water circulated in the jacket 41 flows out are formed on the side surface of the one jacket 41 described above. Similarly, on the side surface of the other jacket 42, an inflow port 42a into which cooling water flows in and an outflow port 41b from which cooling water circulated in the jacket 42 flows out are formed.

A pipe 43 connected to a cooling water supply device (not shown) is connected to an inlet 41 a of the one jacket 41, and an outlet 41 b of the one jacket 41 is connected to the other jacket via a pipe 44. It is connected to the inflow port 42a of 42. The outlet 42b of the other jacket 42 is connected to the cooling water supply device via a pipe 45.

Next, the operation of the refining furnace of this embodiment will be described.

First, the cooling water is supplied from the cooling water supply device through the pipe 43 to the inside of the jacket 41 from the inlet 41a of the one jacket 41, and is discharged from the outlet 41b, and the discharged cooling water is discharged. It is supplied into the jacket 42 from the inflow port 42a of the other jacket 42 through the pipe 44 and discharged from the outflow port 42b. As a result, the jackets 41 and 42 are cooled.

Next, the molten metal is supplied from the copper-making furnace 3 into the furnace body 21 through the gutter 11B. In parallel with this supply, the molten metal is oxidized. Then, when a predetermined amount of molten metal is accumulated in the furnace body 21, oxygen-enriched air is supplied through the tuyere 27 to oxidize the molten metal to remove impurities contained in the molten metal as kalami and to remove sulfur. Removed as SO2 gas. Next, a reducing agent is supplied from the tuyere 27 to remove oxygen dissolved in the molten metal. Further, the furnace main body 21 is tilted around the axis, and the molten metal is flown out from the tap hole 28 and cast into the anode.

According to the present embodiment, since the flue port 30 is formed so as to extend in the circumferential direction of the furnace body 21, the circumferential ends 30b and 30c of the flue port 30 are melted in the furnace body 21. The position is closest to the surface of the hot water. Therefore, as described above, when oxygen or a reducing agent is supplied, or when the furnace body 21 is tilted around the axis, the splash or molten metal splashing from the molten metal surface is the circumferential end of the flue port 30. Adhere to. Conventionally, the splash or molten metal may damage the refractory bricks constituting the flue mouth 30, but in the present embodiment, iron or copper alloy is provided outside the end portions 30b, 30c closest to the molten metal surface. Since the jackets 41, 42 made of steel are attached, even if the plushes adhere to the jackets 41, 42, they are immediately cooled. Therefore, it is possible to prevent the jackets 41 and 42 from being damaged by the heat of the splash or the molten metal. Further, since the scattered splash or molten metal adheres to the surfaces of the jackets 41 and 42 and is solidified, it can be removed more easily than the splash or molten metal adhered to the iron plate around the conventional refractory brick. Moreover, since the jackets 41 and 42 are made of iron or a copper alloy and have a strength higher than that of the iron plate around the refractory bricks, the jackets 41 and 42 are not damaged when the splash or molten metal adhered is removed.

In the embodiment, cooling jackets 41 and 42 are provided at the circumferential ends 30b and 30c of the flue opening 30, which is the inflow port. However, the cooling jackets 41 and 42 are provided so as to surround the entire flue opening 30. You may make it provide the jacket for cooling in.

[0019]

[Effect of device]

 As described above, according to the refining furnace of the present invention, the cylindrical furnace body is provided with the inlet through which the blister copper flows in by extending in the circumferential direction, and the furnace body is tilted around the axis. In a copper refining furnace that refines the crude copper that has flowed into the furnace from the inlet to produce high-quality copper, a cooling jacket is attached to at least the circumferential end of the inlet. Even if splash or molten metal from the surface of the molten metal adheres to the circumferential end of the inlet, it can be cooled immediately and damage to the furnace body can be suppressed, and the splash or molten metal adhered can be easily removed. can do.

[Brief description of drawings]

FIG. 1 is a front view showing the vicinity of a flue port of a smelting furnace of the present invention.

FIG. 2 is a sectional view taken along the line EE in FIG.

FIG. 3 is a view on arrow B in FIG.

FIG. 4 is a plan view showing a conventional copper continuous smelting apparatus.

FIG. 5 is a side view showing a conventional smelting furnace.

[Explanation of symbols]

 21 Furnace body 30 Flue port (inlet) 30b, 30c Circumferential end of flue port 41, 42 Jacket

Claims (1)

[Scope of utility model registration request] 1. A cylindrical furnace main body is provided with an inlet through which blister copper flows in such a manner as to extend in a circumferential direction and open, and the furnace main body is tilted around an axis and flows into the furnace from the inlet. A copper refining furnace for refining the crude copper to produce high-quality copper, wherein a cooling jacket is attached to at least an end portion in the circumferential direction of the inflow port.